Abstract: Based on research of ore-body characteristics，mineralization characteristics and mineralization of composite porphyry in Jiudingshan copper-molybdenum deposit district，the porphyry magma activities in Jiudingshan is preliminarily divided into three phrases. The first phrase consists of syenite porphyry and quartz syenite porphyry；the second phrase includes the combination of porphyritic granite and lamprophyre (a)；the third phrase is the combination of granite porphyry and lamprophyre (b)；Among these，the first and the second phrases are closely related with the mineralization. In accordance with the ore-hosting surrounding rocks，the ore deposit is divided into four types of porphyry ore，skarn ore，hornfels ore and lamprophyre ore. According to the ore-forming elements，the deposit is divided into molybdenum ore，molybdenum-copper ore，copper ore，magnetite ore and gold ore. Copper and molybdenum mineralization is closely related with the quartz-K-feldspar zone and the quartz-sericite zone.

Key words: Copper-molybdenum deposit, Composite porphyry body, Intrusion times, Mineralization, Jiudingshan